Responsibilities fly out the window when Eric and Annie enjoy separate nights out on Friday. Although the reverend can't find anyone to hang out with him, so he calls a bewildered Matt. Annie is conferring with a professor. Mary strays even further away from her parent's image of her when she is tempted to drink and smoke one night after work. Also, Mary makes friends with married co-workers Frankie and Johnny with questionable morals while working the late shift. Matt blows Simon's chance at a big date with an older woman when Matt is distracted by a close encounter of the female kind and forgets to pick up Simon. Also, Lucy gets a taste of the not-so-glamorous side of parenting when her and a classmate take care of an egg.

Tensions run high as a doubtful Julie lets Mary babysit Erica, only if Mary has no visitors. But when Frankie comes by and begs Mary to take care of her baby Mercy, Mary can't resist helping her. Then, Mary is then caught with an open bottle of beer while babysitting. Meanwhile, Lucy volunteers to supervise Ruthie's sleep over, and to watch the twins. Simon is on a quest to change his image, and does this by piercing his ear. Matt pursues a woman who wants nothing to do with him. Also, Eric and Annie clash with Mary's disreputable friends.